using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Lskj.Business.Impl;
using Lskj.Core;
using Lskj.Util;

namespace Lskj.Control
{
    public partial class FrmAnnouncement : BaseForm
    {
        private const string AnnouncementSql = "select * from p_ErpProUpdateInfo where AnnouncementDisplay=1 order by updateDate desc";
        private Panel bottomPanel;
        private DevExpress.XtraEditors.SimpleButton btnConfirm;

        public FrmAnnouncement()
        {
            InitializeComponent();
            InitializeAnnouncementForm();
            this.Load += FrmAnnouncement_Load;
            this.Shown += FrmAnnouncement_Shown;
        }

        private void InitializeAnnouncementForm()
        {
            this.FormBorderStyle = FormBorderStyle.Sizable;
            this.MaximizeBox = true;
            this.MinimizeBox = true;
            this.MinimumSize = new Size(500, 300);

            this.txtEdit.ReadOnly = true;
            this.txtEdit.Properties.ScrollBars = ScrollBars.Vertical;

            bottomPanel = new Panel();
            bottomPanel.Dock = DockStyle.Bottom;
            bottomPanel.Height = 50;

            btnConfirm = new DevExpress.XtraEditors.SimpleButton();
            btnConfirm.Text = "确定";
            btnConfirm.Size = new Size(90, 28);
            btnConfirm.Click += BtnConfirm_Click;

            bottomPanel.Controls.Add(btnConfirm);
            bottomPanel.Resize += BottomPanel_Resize;
            this.Controls.Add(bottomPanel);
            bottomPanel.BringToFront();
            CenterConfirmButton();
        }

        private void FrmAnnouncement_Load(object sender, EventArgs e)
        {
            try
            {
                DataTable table = SqlHelper.ExecuteDataTable(AnnouncementSql);
                this.txtEdit.Text = BuildAnnouncementText(table);
                this.txtEdit.SelectionStart = 0;
                this.txtEdit.SelectionLength = 0;
            }
            catch (Exception ex)
            {
                string message = ErrorMessage.PromptErrorMessage(ex);
                MessageUtil.Show(message, ex.Message);
                LogHelper.Instance.WriteError(ex);
            }
        }

        private void FrmAnnouncement_Shown(object sender, EventArgs e)
        {
            if (btnConfirm != null)
            {
                btnConfirm.Focus();
            }
        }

        private void BottomPanel_Resize(object sender, EventArgs e)
        {
            CenterConfirmButton();
        }

        private void CenterConfirmButton()
        {
            if (bottomPanel == null || btnConfirm == null) return;

            btnConfirm.Location = new Point(
                (bottomPanel.ClientSize.Width - btnConfirm.Width) / 2,
                (bottomPanel.ClientSize.Height - btnConfirm.Height) / 2);
        }

        private void BtnConfirm_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.OK;
            this.Close();
        }

        private string BuildAnnouncementText(DataTable table)
        {
            if (table == null || table.Rows.Count == 0) return string.Empty;

            // 按日期分组（SQL已按updateDate desc排序，分组后日期自然从大到小）
            var dateGroups = new List<KeyValuePair<DateTime, List<string>>>();
            DateTime? currentDate = null;
            List<string> currentGroup = null;

            foreach (DataRow row in table.Rows)
            {
                DateTime updateDate;
                if (!DateTime.TryParse(row["updateDate"] + "", out updateDate))
                    continue;

                DateTime dateOnly = updateDate.Date;
                string content = row["verDesp"] + "";

                if (currentDate != dateOnly)
                {
                    currentDate = dateOnly;
                    currentGroup = new List<string>();
                    dateGroups.Add(new KeyValuePair<DateTime, List<string>>(dateOnly, currentGroup));
                }

                currentGroup.Add(content);
            }

            StringBuilder text = new StringBuilder();
            foreach (var group in dateGroups)
            {
                if (text.Length > 0) text.AppendLine();

                text.Append("时间：");
                text.AppendLine(group.Key.ToString("yyyy-MM-dd"));

                for (int i = 0; i < group.Value.Count; i++)
                {
                    text.AppendLine((i + 1) + ". " + group.Value[i]);
                }
            }

            return text.ToString();
        }

        private string FormatUpdateDate(object value)
        {
            if (value == null || value == DBNull.Value) return string.Empty;

            DateTime updateDate;
            if (DateTime.TryParse(value + "", out updateDate))
            {
                return updateDate.ToString("yyyy-MM-dd");
            }

            return value + "";
        }
    }
}